Device for producing optical illusions.



- PATENTED DEC. 22, 1903.

H. A-. GAGE. DEVIOBPOR PRODUCING OPTICAL ILLUSIONS.

APPLICATION FILED MAR. 1903.

N0 MODEL.

Prrtns No. 747,910. Patented baemter 22, 1903.

A UNITED STATES PATENT I OFFICE.

HARRY A. GAGE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO X-RAY NOVELTY 00., OFPH(ENIX,ARIZONA TERRITORY, A CORPORATION OF ARIZONA TERRITORY.

DEVICE FOR PRODUCING'OPTICAL ILLUSIONS.

SPECIFICATION forming part of Letters Patent No 747,910, dated December22, 1903.

Application filed March 30, 1903. Serial No. 150.208. (No model.)

To a whom it may c nc n same and forcing them together, so that their 50Be it known that I, HARRY A. GAGE, a citimeeting edges will securelygrasp and firmly zen of the United States, residing at St. Louis, holdbetween them the spline and barbs of Missouri, have invented a certainnew and the feather 2, which is placed therebetween, useful Improvementin Devices for Producso as to prevent any possible displacement ing anOptical Illusion, of which the followthereof, which might occur if itwere not for 55 ing is a full, clear, and exact description, such thecircumferential grip provided by the as will enable others skilled inthe art to which meeting faces of the disks. It is quite essenitappertains to make and use the same, reftial to the success of thescheme of illusion 1o erence being bad to the accompanying drawthat thebarbs of the feather be slightly sepaings, forming part of thisspecification, in rated and that the central splines shall be so 0whichdisposed as to extend centrally of the line of Figure 1 is a sideelevational view, partly vision, and to accomplish this separation ofbroken away. Fig. 2 is a vertical sectional the barbs air is forcedthrough the feather view taken centrally of Fig. 1. Fig. 3 is a beforeit is placed between the disks, wheremodified form of holder wherein thehandle by a separation, such as indicated in Fig. 1, 65 portion isformed by twisting an extension will result. The essential requisite ina defrom the channeled ring; and Fig. 4 is a furvice of thischaracter-to be used as a watchther modification in which the handle isconcharm, pocket-piece, or ornament -is that the :0 nected to a splitring, which may or may not transparent disks shall be firmly held inpobe twisted, as desired. sition by some means which will cause them 70This invention relates to new and useful to serve as a clamp for lockingthe feather in devices for producing an optical illusion, and fixedposition, and the channels 4, cooperatrelates especially to details ofconstruction, ing with the concavo-convex disks or lenses formation, andarrangement of the means emshown, have been found best adapted to serveployed for holding the feather used for prothe required purpose. 7ducing thedesired effect. Various forms of holder may be used--as,

Referring to the drawings, 1 indicates the for instance, the one shownin Fig. 1, whereconcavoconvex disks of glass preferably, in thechanneledring is provided with intethough any suitable transparent material gralscrew-threaded studs 6, upon which are may be substitu ted therefor, ifdesired. The screwed the handle 5-or, if desired, the han- 8o disks areplaced side by side with their condle portion may be formed as shown inFig. cave faces inwardly disposed, between which 3, wherein said portionis twisted, as shown is held a feather 2, with the spline thereof at 6",to lock the channel-ring in closed posi- 5 centrally disposed withrelation to the disks tion, or, as shown in Fig. 4, wherein the split 1and the barbs or rami of the feather slightly ring is provided with thehandle portion 6, 85 separated, so that it is possible for the obwhichmaybe drawn together by wires or any server to have direct anduninterrupted sight suitable compression-tool to accomplish the of theobject being viewed through the spaces same result, though the formshown in Figs. between the barbs. The disks 1 and feather 1 and 3 arepreferable, because of the more 2 are held in position between theinwardlysecure locking of the parts in operative poc disposed flanges 4of the circular holding sition. I member 3, the flanges beingsubstantially I am aware that minor changes in the conparallel and soarranged with relation to the struction, arrangement, and combination of'concavo-convex disks 1 that when the memthe several parts of my devicecan be made her 3 is closed, as indicated in Figs. 1, 2, and andsubstituted for those herein shown and 5 3, the flanges 4 will abutagainst said disks 1 described without in the least departing from andin closing ride upwardly on the convex the nature and principle of myinvention. side of said disks, thereby firmly gripping the Having thusdescribed my invention, what I claim as new, and desire to secure byLetters Patent, is-

In a device for producing an optical illusion, a holder comprising aband of metal substantially circular for a portion of its length, havingintegral inwardly-disposed flanges at right angles thereto and having anintegral portion without flanges extending therefrom adapted to form ahandle therefor, in combination with a pair of concavo-convex diskslocated between the flanges of said band with the convexity thereof soproportioned that the closing of said flanged band endwise will pressthe said concave disks laterally together at their edge portions, and afeather which is held between the edge portions, only, of said disks;all combined and arranged substantially as shown and described.

In testimony whereof I hereunto affix my signature, in the presence oftwo Witnesses, this 28th day of March, 1903.

HARRY A. GAGE.

\Vitnesses:

GEORGE BAKEWELL, F. H. GIBBS.

